Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put in my 4550?]

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#319

From: Cristian Croitoru
Date: Sat, 06 Dec 2003 06:30

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> Me
> >Speaking of speed and not being particularly familiar with the SCSI
> >protocol, my common sense tells me that having a stripe on a IDE
> >multichannel controller can push the speed quite some way..
> >Again my common sense tells me that a SCSI controller can not stream data
> >from more than one drive at a time, as only one drive can put data on the
> >bus at the same time
"derek:
> Your common sense failed this time.
> With a SCSI ALL disks can read or write at the same time.
> That is one of the strengths of scsi
>
> Of course, at home you will have trouble using this strength.

Well, I have tried to understand HOW, how is posibile for multiple devices
to send electrical signals on the same wire in the same time.. How is this
possible form the electrical point of view?

With separate channels you have separate buses, separate electrical paths;
the data of the stripe is rebuilt in the controller's logic but essentialy
the logical path is 6 times wider.

I am not trying my skills in retorics, I am just trying to understand..

Thanks

Cristian Croitoru

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From: "Cristian Croitoru" <c_croitoru@hotmail.com>
Newsgroups: alt.sys.pc-clone.dell,aus.computers
Subject: Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put in my 4550?]
Date: Sat, 6 Dec 2003 16:30:46 +1000
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